If you think you might be owed some cash, you can check with the IRS by using the online “Where’s My Refund?” tool. You'll need to provide your Social Security number, filing status as reported on your last return and the amount of your refund. If you don't have access to the internet (which is curious since you're reading this), you can also call 1-800-829-1954.

Tax forms and other correspondences from the IRS are mailed to the last address clearly and concisely provided by the taxpayer, so be sure to update your address on your tax return. You can also update your address at any time using federal form 8822 (downloads as a pdf).